I did that,
they put the bucket outside the workroom,
and I grab a person (he sees the bucket) and he is repairing the wall..
after a few times they repair the wall..
and I grab a person on the bucket again,
suddenly the bucket disappear , the person is just walk away(to do other things like "work on career") and the wall is still broken..

I used 3 or 4 compounds to repair it , but never worked.

maybe this problem only in my game?

I heard my friend said she only use one compound to repair it.